Drilling bit

Abstract

The utility model relates to the technical field of oil exploitation equipment, in particular to a well drilling drill bit which comprises a drill bit body and a protection unit, the protection unit comprises a cover body, a connecting ring, a pressing ring, a spring, a connecting column, a fixing ring, a fixing bolt, a blade assembly and an auxiliary assembly, and the connecting column is inserted into a first threaded hole and aligned with a second threaded hole to be tightened; at the moment, a fixing ring makes contact with the inner bottom wall of a first threaded hole and is fixed through a fixing bolt, the phenomenon that a connecting column retreats and loosens is prevented, then the cover body is downwards closed to be matched with the connecting ring and the first threaded hole for fixing, liquid gravel is prevented from damaging the fixing bolt, and in the process, a pressing ring compresses a spring to provide opposite force for locking the cover body; in this way, the fixing bolt is protected, damage is avoided, normal separation of the drill bit body is guaranteed, and operation and use of workers are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil exploitation equipment technical field especially relates to a well drilling bit. BACKGROUND

[0002] The drilling bit used in oil exploitation is a tool for drilling a well in the ground to exploit oil or natural gas resources, has special design and structure, and most of the conventional drilling bits for oil drilling are of integral structure, the cutting part and the steel body part of the drilling bit of the integral structure are integrally manufactured, once the cutting part is damaged, the cost is easily increased, and resource waste is caused.

[0003] The patent application with the authorized publication number CN221194959U discloses a drilling bit for oil drilling in the prior art, which comprises a bit main body, the bit main body is provided with a fixing groove, the fixing groove is provided with a threaded groove, the threaded groove is provided with a connecting column, the connecting column is provided with a mounting disc, the mounting disc is provided with a plurality of fixing bolts, the connecting column and the bit main body are first fixed through the threaded cooperation of the threaded groove and the external thread of the connecting column, and then the fixing column and the bit main body are installed and fixed through the plurality of fixing bolts, so that the replacement process after the wear of the bit body is facilitated, the cost is reduced, and resource waste is avoided.

[0004] However, in the foregoing prior art, the fixing bolts are exposed for a long time, are prone to wear and tear when rotating due to friction with stones, affect the normal separation of the bit main body, and are not conducive to the use of workers. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a well drilling bit, and aims to solve the problem in the prior art that the fixing bolts are exposed for a long time, are prone to wear and tear when rotating due to friction with stones, affect the normal separation of the bit main body, and are not conducive to the use of workers.

[0006] The utility model provides a drilling bit, including drill bit main part and protection unit, the protection unit includes cover, connecting ring, compression ring, spring, connecting column, fixed ring, fixed bolt, blade assembly and auxiliary assembly, the protection unit is connected with drill bit main part, drill bit main part has first threaded hole, first threaded hole is with connecting ring screw thread cooperation, cover is fixedly connected with connecting ring and is located the top of connecting ring, spring is fixedly connected with drill bit main part and is located the inner bottom wall of first threaded hole, compression ring is fixedly connected with spring and is located the top of spring, and compression ring is in contact with cover, cover has round hole, round hole is with connecting column sliding cooperation, drill bit main part has second threaded hole, second threaded hole is with connecting column screw thread cooperation, fixed ring is fixedly connected with connecting column and is located the outside wall of connecting column, and fixed ring is in contact with first threaded hole, fixed bolt is in sequence with fixed ring and drill bit main part screw connection, blade assembly is connected with drill bit main part, auxiliary assembly is connected with cover.

[0007] Among them, the blade assembly includes a plurality of cutting teeth and spiral blade, the spiral blade is fixedly connected with the drill bit main part and is located on the outer side wall of the drill bit main part, a plurality of cutting teeth are fixedly connected with the spiral blade and are respectively located on the outer side wall of the spiral blade, the spiral blade has a circular arc chamfer.

[0008] Among them, the blade assembly further includes a bottom drill and a crushing tooth, the bottom drill is fixedly connected with the drill bit main part and is located below the drill bit main part, the crushing tooth is fixedly connected with the bottom drill and is located on the outer side wall of the bottom drill.

[0009] Among them, the auxiliary assembly includes a sealing inner ring and a mounting frame, the mounting frame is fixedly connected with the cover and is located on the inner side wall of the cover, the sealing inner ring is detachably connected with the mounting frame and is located on the inner side wall of the mounting frame, and the sealing inner ring is in sliding cooperation with the connecting column.

[0010] Among them, the auxiliary assembly further includes a plurality of arc-shaped rods, a plurality of arc-shaped rods are fixedly connected with the cover and are respectively located above the cover.

[0011] This utility model discloses a drilling bit. The connecting post is inserted into the first threaded hole and then tightened in alignment with the second threaded hole. At this point, the retaining ring contacts the inner bottom wall of the first threaded hole, and is then secured with a fixing bolt to prevent the connecting post from loosening or retracting. Afterwards, the cover is closed to engage the connecting ring and the first threaded hole, preventing liquid debris from damaging the fixing bolt. During this process, the pressure ring compresses the spring, providing a counterforce to lock the cover. The cutting tool assembly is used for drilling operations, and the auxiliary components enhance the usability of the cover. This method protects the fixing bolt from damage, ensuring the normal separation of the drill bit body for easy operation and use by personnel. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a structural schematic diagram of the drilling bit of this utility model.

[0014] Figure 2 This is a front view of the drilling bit of this utility model.

[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.

[0016] Figure 4 This is the utility model Figure 3 Enlarged view of the local structure at point B.

[0017] 101-Drill bit body, 102-Cap, 103-Connecting ring, 104-Pressure ring, 105-Spring, 106-Connecting post, 107-Fixing ring, 108-Fixing bolt, 109-Cutting tooth, 110-Helical blade, 111-Bottom drill, 112-Crushing tooth, 113-Sealing inner ring, 114-Mounting frame, 115-Arc rod, 116-First threaded hole, 117-Round hole, 118-Second threaded hole, 119-Chamfered corner. Detailed Implementation

[0018] Please see Figures 1 to 4 ,in, Figure 1 This is a structural schematic diagram of the drilling bit of this utility model. Figure 2 This is a front view of the drilling bit of this utility model. Figure 3 This is the utility model Figure 2 AA-line sectional view, Figure 4 This is the utility model Figure 3Enlarged view of the local structure at point B.

[0019] This utility model provides a drilling bit, including a drill bit body 101 and a protective unit. The protective unit includes a cover 102, a connecting ring 103, a pressure ring 104, a spring 105, a connecting post 106, a fixing ring 107, a fixing bolt 108, a cutting blade assembly, and an auxiliary assembly. The cutting blade assembly includes multiple cutting teeth 109, a spiral blade 110, a bottom drill 111, and a pulverizing tooth 112. The auxiliary assembly includes a sealing inner ring 113, a mounting frame 114, and multiple arc-shaped rods 115. The drill bit body 101 has a first threaded hole 116, the cover 102 has a circular hole 117, the drill bit body 101 has a second threaded hole 118, and the spiral blade 110 has a rounded chamfer 119.

[0020] The protective unit is connected to the drill bit body 101; the drill bit body 101 has a first threaded hole 116, which is threadedly engaged with the connecting ring 103; the cover 102 is fixedly connected to the connecting ring 103 and is located above the connecting ring 103; the spring 105 is fixedly connected to the drill bit body 101 and is located on the inner bottom wall of the first threaded hole 116; the pressure ring 104 is fixedly connected to the spring 105 and is located above the spring 105, and the pressure ring 104 contacts the cover 102; the cover 102 has a circular shape. Hole 117 is slidably fitted with connecting post 106. Drill bit body 101 has a second threaded hole 118, which is threadedly fitted with connecting post 106. Fixing ring 107 is fixedly connected to connecting post 106 and located on the outer side wall of connecting post 106. Fixing ring 107 is in contact with first threaded hole 116. Fixing bolt 108 is threadedly connected to fixing ring 107 and drill bit body 101 in sequence. Blade assembly is connected to drill bit body 101. Auxiliary assembly is connected to cover 102.

[0021] In this embodiment, during use, the connecting post 106 is inserted into the first threaded hole 116 and tightened by aligning it with the second threaded hole 118. At this time, the fixing ring 107 contacts the inner bottom wall of the first threaded hole 116, and then the fixing bolt 108 is used for fixation to prevent the connecting post 106 from loosening. Afterwards, the cover body 102 is closed downwards to cooperate with the connecting ring 103 and fix it to the first threaded hole 116, preventing liquid debris from damaging the fixing bolt 108. During this process, the pressure ring 104 compresses the spring 105 to provide a reverse force for locking the cover body 102. The blade assembly is used for drilling operations, and the auxiliary assembly is used to improve the practicality of the cover body 102. In this way, the fixing bolt 108 is protected to avoid damage, ensuring the normal separation of the drill bit body 101, so as to facilitate operation and use by the operator.

[0022] Furthermore, the spiral blade 110 is fixedly connected to the drill bit body 101 and is located on the outer side wall of the drill bit body 101. The plurality of cutting teeth 109 are all fixedly connected to the spiral blade 110 and are respectively located on the outer side wall of the spiral blade 110. The spiral blade 110 has a rounded chamfer 119.

[0023] In this embodiment, the spiral blade 110 can crush rocks under the action of rotation, and the cutting tooth 109 uses polycrystalline diamond composite sheet as the cutting tooth material. Its high hardness and excellent wear resistance can effectively resist the wear of rocks and extend the service life of the cutting tooth 109.

[0024] Furthermore, the bottom drill 111 is fixedly connected to the drill bit body 101 and is located below the drill bit body 101, and the shredding tooth 112 is fixedly connected to the bottom drill 111 and is located on the outer side wall of the bottom drill 111.

[0025] In this embodiment, the bottom drill 111 and the crushing tooth 112 work together to drill holes in the rock, which facilitates the operation of the cutting tooth 109 and completes the oil drilling.

[0026] Furthermore, the mounting frame 114 is fixedly connected to the cover 102 and is located on the inner sidewall of the cover 102. The sealing inner ring 113 is detachably connected to the mounting frame 114 and is located on the inner sidewall of the mounting frame 114. The sealing inner ring 113 is slidably engaged with the connecting post 106.

[0027] In this embodiment, the sealing inner ring 113 within the mounting frame 114 can prevent mud from entering the underside of the cover 102 through the round hole 117, thus preventing internal components from being corroded and extending their service life.

[0028] Furthermore, each of the multiple arc-shaped rods 115 is fixedly connected to the cover 102 and is located above the cover 102.

[0029] In this embodiment, the plurality of arc-shaped rods 115 are used to drive the cover 102 to rotate, which can effectively improve the practicality of the cover 102.

[0030] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of this application, still fall within the scope of this application.

Claims

1. A drilling bit, comprising a bit body, characterized in that, It also includes a protection unit, which is connected to the drill bit body; The protective unit includes a cover, a connecting ring, a pressure ring, a spring, a connecting post, a fixing ring, a fixing bolt, a blade assembly, and an auxiliary assembly. The drill bit body has a first threaded hole, which is threadedly engaged with the connecting ring. The cover is fixedly connected to the connecting ring and located above it. The spring is fixedly connected to the drill bit body and located on the inner bottom wall of the first threaded hole. The pressure ring is fixedly connected to the spring and located above it, and it contacts the cover. The cover has a circular hole, which is slidably engaged with the connecting post. The drill bit body has a second threaded hole, which is threadedly engaged with the connecting post. The fixing ring is fixedly connected to the connecting post and located on the outer side wall of the connecting post, and it contacts the first threaded hole. The fixing bolt is threadedly connected to the fixing ring and the drill bit body in sequence. The blade assembly is connected to the drill bit body. The auxiliary assembly is connected to the cover.

2. The drilling bit as described in claim 1, characterized in that, The blade assembly includes multiple cutting teeth and a helical blade. The helical blade is fixedly connected to the drill bit body and located on the outer side wall of the drill bit body. The multiple cutting teeth are all fixedly connected to the helical blade and are respectively located on the outer side wall of the helical blade. The helical blade has a rounded chamfer.

3. The drilling bit as described in claim 2, characterized in that, The blade assembly also includes a bottom drill and a shredder. The bottom drill is fixedly connected to the drill bit body and located below the drill bit body. The shredder is fixedly connected to the bottom drill and located on the outer side wall of the bottom drill.

4. The drilling bit as described in claim 3, characterized in that, The auxiliary component includes a sealing inner ring and a mounting frame. The mounting frame is fixedly connected to the cover and located on the inner sidewall of the cover. The sealing inner ring is detachably connected to the mounting frame and located on the inner sidewall of the mounting frame. The sealing inner ring is slidably engaged with the connecting post.

5. The drilling bit as described in claim 4, characterized in that, The auxiliary component also includes multiple arc-shaped rods, each of which is fixedly connected to the cover and is located above the cover.

Images